(19)
(11) EP 1 775 359 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
05.09.2007 Bulletin 2007/36

(43) Date of publication A2:
18.04.2007 Bulletin 2007/16

(21) Application number: 06018643.4

(22) Date of filing: 06.09.2006
(51) International Patent Classification (IPC): 
D03D 47/34(2006.01)
D03D 47/30(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK YU

(30) Priority: 17.10.2005 JP 2005301288

(71) Applicant: TSUDAKOMA KOGYO KABUSHIKI KAISHA
Kanazawa-shi, Ishikawa-ken 921-8650 (JP)

(72) Inventors:
  • Yamazaki, Koki
    Kanazawa-shi Ishikawa-ken 921-8650 (JP)
  • Kontani, Hideyuki
    Kanazawa-shi Ishikawa-ken 921-8650 (JP)

(74) Representative: Samson & Partner 
Patentanwälte Widenmayerstraße 5
80538 München
80538 München (DE)

   


(54) Method of determining defect in weft supply package in fluid jet loom


(57) In a fluid jet loom (1), values that are based on weft signal generation timings generated from a weft sensor (18 or 28) and that are obtained when a normally operating weft supply package (10), used for supplying weft, is used are successively calculated according to respective predetermined operating period parts, and standard threshold values for determining a defect in the weft supply package (10) are determined on the basis of these values according to the predetermined operating period parts while making allowance for an allowable range, and are previously stored as threshold-value information corresponding to passage of the operating period. Thereafter, when a weft supply package (10) of a same weft type is used, a standard threshold value corresponding to an operating period part is read out from the stored threshold-value information, and the value based on the weft signal generation timings generated from the weft sensor (18 or 28) is calculated, the calculated value based on the weft signal generation timings and the read out standard threshold value corresponding to the operating period part are compared with each other, and a determination is made as to whether or not a defect has occurred in the currently used weft supply package from a magnitude relationship obtained from the comparison.







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